Tips for precisely operating big crane's transmission

2016-10-25

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The operation of the transmission in the big crane differs according to the driving situations and road conditions. Let's see what precautions need be taken into consideration.

Starting

Before the start, release the hand brake and turn off PTO switch. Then start the equipment at 1st or 2nd gear according to the road conditions.

Running period

For gear shifting, the clutch must be released thoroughly and the gear lever should be set to a gear properly. When the transmission of the big crane is shifted from low range to high range, do operate the transmission gear by gear without jumping for fear that the service life of synchronizer of auxiliary transmission would be affected. When the transmission is shifted from 4th to 5th gear (or from 5th to 4th gear), attention should be paid to wait for a while so that the shifting from high range to low range can be completed by use of the auxiliary transmission. In the case of abnormal noise from the transmission, obviously greater effort or other abnormal conditions, stop the equipment immediately for inspection, and continue to run the big crane only after the fault is eliminated.

Uphill

Select and engage an appropriate gear in advance according to the slope condition. Before uphill, accelerate the big crane and make full use of the inertia of the crane to climb the slope. In the case of insufficient or excessive power, shift down or up gears in time. If the machine runs at creeper gear, stop it and then engage a gear to avoid damaging the internal parts of the transmission.

Downhill

Before downhill, decelerate the big crane and run it slowly to the slope. Coasting at neutral gear is prohibited strictly, and shifting between high and low ranges is also prohibited during the downhill.

Stopping

There are two neutral positions for the gear lever, one in high range and the other in low range. When stopping the equipment, place the gear lever at the neutral position in low range and apply the hand brake.

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